Question

A crate remains stationary after it has been placed on a ramp inclined at an angle with the horizontal. Which of the following statements must be true about the magnitude of the frictional force that acts on the crate?(a) It is larger than the weight of the crate.(b) It is at least equal to the weight of the crate.(c) It is equal to μsn.(d) It is greater than the component of gravitational force acting down on the ramp.(e) It is equal to the component of gravitational force acting down on the ramp.

Answer 1

(D) the frictional force must be greater than the component of the gravitational force that acts down the ramp